九州大学 · エネルギー
Chitiphon Chuaicham教授の研究室では、光触媒材料の開発に注力しており、特に酸化亜チタンやカーボンナノタブレット（g-C₃N₄）、ゼオライト様ケイ酸塩（セピオライト）を含む無機酸化物や層状水酸化物を基体にした複合材料を対象に、可視光応答性と効率的な電子捕捉特性の解明を進めています。反転二重ビーム光音響分光法を用いた電子捕獲状態のエネルギー分解能測定により、光触媒の反応機構を微視的に解明する独自の分析手法を確立しています。また、廃棄物由来原料（鉄鉱石由来のフェロウス酸化物）を用いた持続可能な光触媒の創出にも取り組んでいます。
Figures are computed from collected data and may differ slightly.
In this study, ZnTi-mixed metal oxides (ZTM), such as ZnTiO<sub>3</sub>, were synthesized from ZnTi layered double hydroxides by varying the molar ratio of Zn/Ti, calcination temperatures, and synthesis methods (hydrothermal or reflux). The surface electronic characteristics of ZTM were investigated by the energy-resolved distribution of electron traps (ERDTs) using reversed double-beam photoacoustic spectroscopy. The ZTM samples obtained by conducting hydrothermal synthesis at 500 °C showed sim
The photocatalytic activity of sepiolite was examined for degradation of several dye compounds under visible light irradiation. Higher adsorption capacities and greater photocatalytic performance of cationic dyes (rhodamine B and methylene blue) were observed on sepiolite, in comparison with anionic dyes (orange II and trypan blue). Superiority in the photocatalytic activity of cationic dyes is attributed to the strong electrostatic attraction and photosensitization properties of cationic dye mo
We report for the first time to our knowledge the identification of heteroatom-doped and undoped C<sub>3</sub>N<sub>4</sub> with the energy-resolved distribution of electron traps (ERDT) near the conduction band bottom position (CBB) using reversed double-beam photoacoustic spectroscopy. The ERDT/CBB pattern is used to classify the type of elemental doping in C<sub>3</sub>N<sub>4</sub>, related to photocatalytic efficiency.
Photocatalysis is a remarkable methodology that is popular and applied in different interdisciplinary research areas such as the degradation of hazardous organic contaminants in wastewater. In recent years, clay-based photocatalyst composites have attracted significant attention in the field of photocatalysis owing to their abundance, excellent light response ability, and stability. This review describes the combination of clay with focusing photocatalysts such as TiO2, g-C3N4, and Bi-based comp
In this study, iron oxalate dihydrate (FOD-ore) was produced from iron ore by the process using oxalic acid to extract iron, followed by photo-reduction. Several techniques, such as X-ray powder diffraction (XRD), Raman, scanning electron microscopy with energy dispersive X-Ray analysis (SEM-EDX), ultraviolet–visible diffuse reflectance spectroscopy (UV-DRS), photoluminescence spectroscopy (PL), and X-ray photoelectron spectroscopy (XPS), were used to determine the physicochemical properties of
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